21012010202001 has 32 divisors (see below), whose sum is σ = 34483030946560. Its totient is φ = 11082684881664.

The previous prime is 21012010201969. The next prime is 21012010202039. The reversal of 21012010202001 is 10020201021012.

It is not a de Polignac number, because 21012010202001 - 2⁵ = 21012010201969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012010202501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3323391 + ... + 7284843.

It is an arithmetic number, because the mean of its divisors is an integer number (1077594717080).

Almost surely, 2^{21012010202001} is an apocalyptic number.

21012010202001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21012010202001 is a deficient number, since it is larger than the sum of its proper divisors (13471020744559).

21012010202001 is a wasteful number, since it uses less digits than its factorization.

21012010202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980905.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21012010202001 its reverse (10020201021012), we get a palindrome (31032211223013).

The spelling of 21012010202001 in words is "twenty-one trillion, twelve billion, ten million, two hundred two thousand, one".